Starship Asterisk*

Perhaps the impacting object had broken up shortly before striking Mercury, similarly as did that asteroid that struck Jupiter? Only the Mercury object broke into two pieces (one larger than the other) and they were not far apart from each other when striking the surface causing the 2 impact featur...

I remember when, at 10, found out that my classmates did not see the face in the moon that I had thought was evident to everybody and I could not refer to the eye at right to explain a landing site. Now I think that my eyesight was somewhat poor and it mattered. The face I recognize now as my old re...

AVAO wrote: ↑Sun Sep 01, 2024 7:51 pm

Click to view full size image 1 or image 2

Bonus: The stem of the rose Credit: NASA/ESA (HERSCHEL)

far infrared?
The wavelengths that Herschel Space Observatory registered were 55 to 672 μm

Ann wrote: ↑Sat Aug 31, 2024 6:33 am it's hard to say where the NGC 7771 star streams end and the Milky Way Integrated Flux Nebula begins
Ann

I wonder if the red shift from 200 millions ly away can help

I find it interesting that in the last link is this bit: https://www.nasa.gov/centers-and-facilities/goddard/nasas-fermi-telescope-discovers-first-gamma-ray-only-pulsar/#:~:text=The%20instrument%20sees%20about%20one%20gamma%20ray%20every%20minute Fermi’s Large Area Telescope scans the entire sky ev...

Of course, we see our own galaxy exactly edge on, so that we see many layers of dust features superimposed on one another. In Andromeda, we see the dust features separately. Is that why the dust lane of the Milky Way appears to be thicker than the dust features of Andromeda? And is that why we see ...

Of course, we see our own galaxy exactly edge on, so that we see many layers of dust features superimposed on one another. In Andromeda, we see the dust features separately. Is that why the dust lane of the Milky Way appears to be thicker than the dust features of Andromeda? And is that why we see ...

So how is the incoming direction determined, to specify that "bright spot"? The Large Area Telescope (LAT) detects individual gamma rays… The LAT's field of view is large, about 20% of the sky. The resolution of its images is modest by astronomical standards, a few arc minutes for the hig...

The blue background that fills the image is the diffuse glow of gamma-rays from distant sources that are too dim to be detected individually. To my eye lighter regions of the blue background in the ɣ map by 12 years of Fermi satellite correlates to amber regions of the brown background in the X-ray...

https://apod.nasa.gov/apod/calendar/S_240819.jpg IC 5146: The Cocoon Nebula Explanation: Inside the Cocoon Nebula is a newly developing cluster of stars. Cataloged as IC 5146 , the beautiful nebula is nearly 15 light-year s wide. Soaring high in northern summer night skies , it's located some 4,000...

Thank you, Ann for a very good presentation and an interesting website. However it, like all other depiction of the local region of our galaxy, does not translate the information into a depiction of the sky as you see it when you walk outside on a dark moonless night. Translating those 3-4000 visib...

The second law of thermodynamics says that the entropy of a system is always increasing, and so eventually everything will be in a state of max disorder and "evenly mixed", but looking scenes like the Triffid Nebula (estimated age 300,000 years) it's difficult to imagine that the universe...

johnnydeep wrote: ↑Tue Aug 13, 2024 9:32 pm Be sure to click on the "top of the frame" link to see the close-up inset view of the jet from here https://www.flickr.com/photos/frankie57pr/53877835585/

Click to view full size image

no violet stars…

For Kuiper Belt object, though, we don't really need to measure them. We know that they are not tidally locked to the Sun, and therefore have their entire surfaces exposed to sunlight as they rotate. And even at that distance, that's a lot of heating when we're talking about objects sitting at just...

I don't know. The so-called jets don't seem so obvious to me. Are these supposed to be the jets? hh120 jets.jpg I went for something bigger than that. Like slash lines across this frame: Cometary Globules (2024 Jul 16) 3.jpg I don't get it. This image looks to be no better than the one I clipped fr...

I'd call HH120 the red dot smack dab in the middle of the head of CG30, not " near its head". But the other CGs sport reddish glows outlining their heads almost as much as CG30 does. I just find it odd to call out the reddish glow of CG30 as particularly noteworthy. zoom in and see the je...

I'd call HH120 the red dot smack dab in the middle of the head of CG30, not " near its head". But the other CGs sport reddish glows outlining their heads almost as much as CG30 does. I just find it odd to call out the reddish glow of CG30 as particularly noteworthy. zoom in and see the je...

Since the text didn't make clear which one was CG30, I had to find another reference. From https://astrodonimaging.com/gallery/cometary-globules-cg30-cg31-in-puppis/ CG30,31 is a cometary globule complex located in southern portion of the large Gum Nebula at RA 8hr 08min 50.5s and DEC -35d 50m 54s ...

"This model assumes that the central black hole of the galaxy emits anti-gravitational or non-gravitational matter in two opposite directions. The emitted matter is called X-matter because the properties of the emitted matter are completely unknown (the "X" stands for "unknown&q...

Fig. 1. The image of the Tadpole galaxy UGC 10214 with labeled 3 galaxies as a local galactic cluster. The image is credited to: NASA, H. Ford (JHU), G. Illingworth (UCSC/LO), M.Clampin (STScI), G. Hartig (STScI), the ACS Science Team, and ESA The image of the Tadpole galaxy UGC 10214 with labeled ...

I often wonder what the sky would look like for a person living on a planet that orbited around a star in this cluster! I'm pretty sure the view would be awesome! Except it's not likely that many stars in a globular cluster have planets. The view from inside a rich globular cluster might be somethi...

The distance to the center of the cluster is known with very high accuracy (5.24±0.11 kpc based on Gaia parallax) so the positional shifts of seven stars close to the center yield accurate radial velocity values, which define minimum 3D velocities. As those velocities are greater than the cluster e...

then again whether that IMBH is a binary or multiple we have no idea

Fast-moving stars around an intermediate-mass black hole in ω Centauri The fastest and the centremost star (Fig. 1, star A) has a 2D proper motion of 4.41 ± 0.08 mas/yr (113.0 ± 1.1 km/s). This is higher than the escape velocity of the cluster if no IMBH is present, v_esc = 62 km/s. The combined co...

Why do the white blob and the yellow blob appear to be windblown in opposite directions? The windblown white blob, by the way, is ever so slightly similar to Hubble's Variable Nebula . https://upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Hubble%27s_Variable_Nebula_-_NGC_2261.png/290px-Hubble%2...